1,4-dihydropyridine derivatives with calcium agonist and alpha1 -antagonist activity

ABSTRACT

1,4-Dihydropyridine derivatives which combine both calcium agonist and alpha1-antagonist activity are useful in treating congestive heart failure. These derivatives are compounds having the formula: &lt;IMAGE&gt; (I)  wherein Ar, R3, R4, R5 and R6 are defined in the specification.

RELATED APPLICATION

This application is a continuation-in-part of copending U.S. application Ser. No. 892,293 filed Aug. 4, 1986, now abandoned.

FIELD OF THE INVENTION

This invention relates to certain novel 1,4-dihydropyridines, processes for their preparation, pharmaceutical compositions containing them, and methods of using them to treat congestive heart failure, and more particularly to such 1,4-dihydropyridines having both calcium agonist and alpha₁ -antagonist activity and which combine both calcium agonist and alpha₁ -antagonist activity and are useful in the treatment of congestive heart failure.

BACKGROUND OF THE INVENTION

Over the past decade, dihydropyridine calcium antagonists have become widely known therapeutic agents having vasodilator properties which can be used as antihypertensives and coronary agents. More recently, it has been found that small structural modifications produce dihydropyridines with effects diametrically opposed to those of calcium antagonists. In contrast to the calcium antagonists, dihydropyridines such as Bay K8644 and CGP28392 promote an influx of calcium ions, therefore producing positive inotropic and vasoconstrictor effects. Bay K8644 is more than 10 times as potent as a calcium agonist than CGP28392. However, Bay K8644 is toxic because it causes coronary vasoconstriction and therefore it is only useful as a therapeutic tool to ascertain the function of calcium entry blockers but is not useful in therapeutics as a cardiotonic. ##STR2##

Representative of the art in the field of dihydropyridine calcium agonists are U.S. Pat. No. 4,248,873 issued Febr. 3, 1981, published European Patent Application No. 0071819, U.S. Pat. Nos. 4,537,881 issued Aug. 27, 1985 and 4,532,248 issued July 30, 1985 amongst others. Literature references include M. Schram, et al., Nature, 303, 535 (1983); M. Schram et al., Arzneim-Forsch., 33, 1268 (1983); P. Erne et al., Biochem. Biophys. Res. Commun., 118, 842 (1984).

Combining calcium agonist properties and alpha₁ -adrenergic blocking properties in a single molecular structure provides a new and attractive principle for the treatment of congestive heart failure. The combination of these two principles provides a novel class of cardiotonics which have minor cardiac stimulatory effects in combination with pronounced vasodilator properties. The detrimental vasoconstricting properties which are normally associated with dihydropyridine calcium agonists are minimized by including the alpha₁ -adrenergic blocking properties which cause dilation of the peripheral vasculature.

SUMMARY OF THE INVENTION

According to the present invention there is provided to new 1,4-dihydropyridine derivatives of the general Formula (I) which possess both calcium channel activity and alpha₁ -adrenergic blocking properties and are useful in the treatment of congestive heart failure. These compounds have the formula: ##STR3## or a pharmaceutically acceptable salt thereof wherein Ar is ##STR4## where Z and R⁵ are taken together as as ##STR5## where t is 0 to 6; R¹ and R² independently are H, alkyl of 1-4 carbon atoms, haloalkyl of 1-4 carbon atoms, haloalkoxy of 1-4 carbon atoms, alkoxy of 1-10 carbon atoms, halogen, NO₂, (CH₂)_(q) XR⁷, XCH₂ (C₂ -C₉ alkenyl)R⁷, or XCH₂ (C₂ -C₉ alkynyl)R⁷ ; provided that both R¹ and R² are not hydrogen except when R⁵ is CO₂ R⁷ or COR⁷ ;

R³ independently is NO₂, H, CN, or CONH₂, or taken together with R⁴ is ##STR6## R⁴ and R⁶ independently are alkyl of 1-4 carbon atoms, CN, CH₂ OH, or CH₂ OCH₂ CH₂ NH₂ ;

R⁵ independently is CO₂ R⁷ or COR⁷ when R¹ and R² are other than (CH₂)_(q) XR⁷, XCH₂ (C₂ -C₉, -alkenyl)R⁷, or XCH₂ (C₂ -C₉ alkynyl)R⁷, and can also be an alkyl ester of 1 10 carbon atoms, ##STR7## NO₂, or phenyl NHCO when one of R¹ or R² is (CH₂)_(q) XR⁷, XCH₂ alkenyl)R⁷, or XCH₂ (C₂ -C₉ alkynyl)R⁷, or is taken together with Z as ##STR8## R⁷ is selected from --(A)_(r) --NH--Y--Ar', or ##STR9## where A is a straight or branched alkyl, alkenyl or alkynyl chain

Ar' is phenyl with one or two substituents selected from alkyl of 1-4 carbon atoms, haloalkyl of 1-4 carbon atoms, alkoxy of 1-4 carbon atoms, halogen, and NO₂ ; 2-, 3- or 4-pyridine; 2,6-pyrimidine; ##STR10## R⁸ is H or OCH₃ ; R⁹ is H, halogen, NO₂, alkoxy of 1-4 carbon atoms, or alkyl of 1-4 carbon atoms;

X is O, S or NH;

Y is (CH₂)_(q), (CH₂)_(n) O, (CH₂)_(n) NH or (CH₂)_(n) S;

n is independently 1, 2 or 3;

p is 0 to 10;

q is 0, 1 or 2 and;

r is 1 to 10 provided that:

(1) when R⁵ is CO₂ R⁷ and R⁷ is ##STR11## or where R² is (CH₂)_(q) XR⁷, then p cannot be 0; and (2) when R⁵ is COR⁷, then R⁷ must be ##STR12## and p must be 0.

The compounds of the present invention can exist as optical isomers and both the racemic mixtures of these isomers as well as the individual optical isomer which confers agonist activity are within the scope of the present invention. The racemic mixtures can be separated into their individual isomers by well known techniques such as the separation of the diastereomeric salts formed with optically active acids, followed by conversion back to the optically active 1,4-dihydropyridine.

Also provided are pharmaceutical compositions comprising a suitable pharmaceutical carrier and a compound of Formula (I) and methods of using the compounds of Formula (I) to treat congestive heart failure.

Further provided are processes for preparing compounds of Formula (I), which processes will be described in detail hereinafter.

PREFERRED EMBODIMENTS

Preferred compounds are those of Formula (I) wherein:

(a) Ar is ##STR13## or (b) One of R¹ and R² is hydrogen and the other is Cl, CF₃, NO₂, OCH₃ or OR⁷, and R⁹ is H or halogen; or

(c) R³ independently is NO₂, or taken together with R⁴ is ##STR14## or (d) R⁴ and R⁶ independently are alkyl of 1-4 carbon atoms, CH₂ OCH₂ CH₂ NH₂ ; or

(e)

(i) R⁵ is CO₂ R⁷ or COR⁷ when R¹ and R² are other than (CH₂)_(q) XR⁷, XCH₂ (C₂ -C₉ alkenyl)R⁷ or XCH₂ (C₂ -C₉ alkynyl)R⁷ ;

(ii) R⁵ is an alkyl ester of 1-10, carbon atoms, NO₂, or phenyl NHCO when one of R¹ or R² is OR⁷ ; or

(f)

R⁷ is --(CH₂)_(r) --NH--(CH₂)_(n) --O--Ar', or ##STR15## where Ar' is ##STR16## 2-pyridine, or 2,6-pyrimidine and (g)

R⁹ is H or halogen; and

n, p, R⁴, R⁶ and R⁸ are as defined previously.

Most preferred are preferred compounds where:

(a) one of R¹ and R² is OR⁷ with the proviso that R⁵ =alkylester of 1-10 carbon atoms;

(b) R³ is NO₂ ; or

(c) R⁴ =R⁶ is alkyl of 1-4 carbons, preferably CH₃ ; or

(d) when both R¹ and R² do not equal OR⁷, then R⁵ is CO₂ R⁷ where R⁷ is ##STR17## and Ar' is ##STR18## 2-pyridine or 2,6-pyrimidine; and p and R⁸ are as defined previously.

Specifically preferred compounds are:

(a) 1,4-Dihydro-2,6-dimethyl-5-nitro-4-[3-(trifluoromethyl)phenyl]-[2-[4-(2-methoxyphenyl)-1-piperazinyl]ethyl]ester-3-pyridinecarboxylic acid.

(b) 1,4-Dihydro-2,6-dimethyl-4-[3-(2(4-(2-methoxyphenyl)-1-piperazinyl)ethoxy)phenyl]-5-nitro-methylester-3-pyridinecarboxylic acid.

(c) 1,4-Dihydro-2,6-dimethyl-4[2-(2-(4-(2-methoxyphenyl)-1-piperazinyl)ethoxy)phenyl]-5-nitro-methylester-3-pyridinecarboxylic acid.

(d) 1,4-Dihydro-2,6-dimethyl-4-[2-(2-(4-(2-methoxyphenyl)-1-piperazinyl)ethoxy)-3-(trifluoromethyl)-phenyl]-5-nitro-methyl-ester-3-pyridinecarboxylic acid.

(e) 1,4-Dihydro-2,6-dimethyl-4-[2-(3-(4-(2-methoxyphenyl)-1-piperazinyl)propoxy)phenyl]-5-nitro-methylester-3-pyridinecarboxylic acid.

(f) 1,4-Dihydro-2,6-dimethyl-5-nitro-4-[2-(2-(4-(2-pyrimidinyl)-1-piperazinyl)butoxy)phenyl]-methylester-3-pyridinecarboxlic acid.

(g) 1,4-Dihydro-2,6-dimethyl-4-[2-(5-(4-(2-methoxyphenyl)-1-piperazinyl)pentoxyl)phenyl]-5-nitro-methylester-3-pyridinecarboxylic acid.

(h) 1,4-Dihydro-4-[2-(10-(4-(2-methoxyphenyl)1-piperazinyl)decyloxy)phenyl]-5-nitromethylester-3-pyridinecarboxylic acid.

DETAILED DESCRIPTION OF THE INVENTION Synthesis

The dihydropyridines of the general Formula (I), according to the present invention, can be prepared by the processes illustrated below. It is understood in all of these processes that R¹ , R², R³, R⁴, R⁵, R⁶, R⁶, R⁷, R⁸, R⁹, Ar, Ar', X, n, p and r have the above mentioned meanings. Methods A-E are substantially the same as the methods described in U.S. Pat. No. 4,448,964 which issued May 15, 1984. ##STR19##

This method is carried using the process described in H. Herbert Fox, et al., J. Org. Chem. 16, 1259 (1951).

The reaction is carried out in a mixture of an equal molar ratio of the starting compounds II, III, and Iv or II, lII', IV' in the presence of an alcoholic solvent such as methanol, ethanol, i-propanol, n-butanol, etc., an aromatic hydrocarbon such as benzene, toluene, etc, an ether such as tetrahydrofuran (THF), dioxane, etc., a halogenated hydrocarbon such as chloroform, carbon tetrachloride, etc., an aprotic polar solvent such as acetionitrile, dimethylformamide (DMF), dimethylsulfoxide (DMSO), etc. or the like at a temperature in the range of room temperature to 200° C., preferably at 60°-110° C. Separation of the desired product from the reaction mixture is effected by conventional techniques such as filtration, concentration, extraction, column chromatography, recrystallization, etc. ##STR20##

B Loev, et al., J. Med. Chem., 17, 956 (1974).

The reaction is carried, out in an equal molar mixture of compounds II, IV' and IV with an equal or excess molar amount of ammonia gas or a salt thereof in the presence of a solvent using the reaction conditions described in Method A. ##STR21##

The method is carried out according to the procedure described by M. Iwanami, et. al., Chem. Pharm. Bull., 27, 1426 (1979) using either compounds of Formula V and III, or III and VI as starting materials. ##STR22##

The reaction of Method D is carried out using V and IV or VI and IV, as starting materials with an equal or excess molar amount of gaseous ammonia or a salt thereof. ##STR23##

T. Shibanuma, et. al., Chem. Pharm. Bull. 28, 2809 (1980).

The reaction of Method E is carried out with a mixture of compounds VII and VIII in a molar ratio between 1.0:0.9 and 1.0:3.0 in a suitable solvent at a temperature in the range of -78° to 100° C., preferably at -20° to 10° C. Separation of the desired product from the reaction mixture is effected by conventional operations such as filtration, concentration, extraction, column chromatography, recrystallization, etc. ##STR24##

In this method R¹⁰ is defined as H₂ N--(CH₂)_(r) --Y--Ar or ##STR25## and R¹¹ is Br, Cl, I, tosylate (OTs), mesylate (OMs), or triflate (OTf). The reaction is carried out by reacting compounds IX and X or XI and X in a molar ratio of 1.0:1.0 to 1.0:3.0 in the presence of an alcohol such as methanol, ethanol, isopropanol, n-butanol, etc., an aromatic hydrocarbon such as benzene, toluene, etc., a halogenated hydrocarbon such as chloroform, carbon tetrachloride etc., an ether such as THF, dioxane, etc. or an aprotic solvent such as acetonitrile, DMF, DMSO, etc., at a temperature in the range of room temperature to 200° C., preferably at 100° to 150° C. Separation of the desired product from the reaction mixture is effected by conventional operations such as filtration, concentration, extraction, column chromatography, recrystallization, etc.

As shown in path (c), the anion of compound XII is generated by reacting compound XII with a base such as sodium hydride or potassium hydride in a molar ratio of 1.0:1.0 to 1.0:2.0 in the presence of an aromatic hydrocarbon such as benzene, toluene, etc., a halogenated hydrocarbon such as dichloromethane, carbon tetrachloride, etc., an ether such as THF, DME, etc., or an aprotic solvent such as acetonitrile, DMF, etc., at a temperature in the range of -20° C. to 200° C., preferably of 0° C. to 25° C. To this anion is then added XIII in a molar equivalent of 1 to 20, preferably of 2 to 4. This reaction mixture is stirred at a temperature in the range of room temperature to 200° C., preferably of 50° C. to 150° C. Separation of the desired product from the reaction mixture is effected by conventional operations such as filtration, concentration, extraction, column chromatography, recrystallization, etc. The conversion of compound IX to Compound I is described in path (a) of this method.

A resulting basic compound can be converted into a corresponding acid addition salt by reacting it with an inorganic or organic acid as is well known to one skilled in the art. Therapeutically useful acids include, for example, inorganic acids, e.g., hydrochloric, hydrobromic, sulfuric, phosphoric, nitric, etc., or organic acids, e.g., formic, acetic, propionic, succinic, maleic, tartaric, ascorbic acid, etc. ##STR26##

As shown in Scheme G, path (a), to prepare compounds wherein R⁵ is COR⁷, a compound of formula VII can be treated with a suitable amine of formula ##STR27## in a manner similar to that described in Method E.

As shown in path (b), the reduction of carboxylic acid XIV to allylic alcohol XV is carried out in a suitable solvent at a temperature in the range of -78° C. to 100° C., preferably -20° C. to 15° C., using a reducing agent such as a borane·THF complex, etc. in a molar ratio between 1.0:1.0 to 1.0:4.0. Separation of the desired product from the reaction mixture is effected by conventional operations such as filtration, concentration, extraction, column chromatography, recrystallization, etc.

Conversion of alcohol XV to compound XVI is achieved using procedures described in Method F, path (c).

As shown by path (c), the preparation of compounds where Z and R⁵ are taken together to form a ring linked as ##STR28## is carried out by esterification or Lactonization procedures well known to one skilled in the art such as that described in DE3235-221. The reaction is run in an ethereal solvent such as THF, dioxane, an aromatic hydrocarbon such as benzene or toluene, a halogenated hydrocarbon such as carbon tetrachloride or chloroform, or an aprotic solvent such as acetonitrile, dimethylformamide or the like at a temperature in the range of -10° C. to 200° C., preferably at 50°-120° C.

The compounds of this invention and their preparation can be understood further by the following examples, but should not constitute a limitation thereof. In these examples, unless otherwise indicated, all temperatures are in degrees centigrade and parts and percentages are by weight.

EXAMPLE 1 Part A: Preparation of 1,4-Dihydro-2,6-dimethyl-5-nitro-4-[3-trifluoromethyl)phenyl]-(2-chloroethyl)ester-3-pyridinecarboxylic acid

A mixture of 11.2 g (62.4 mmol) of 3-trifluoromethylbenzaldehyde, 6.5 g (62.4 mmol) of nitroacetone and 10 g (62.4 mmol) of 3-amino-β-chloroethyl-acetoacetate in 200 mL of absolute ethanol was stirred at room temperature under nitrogen for 36 hours. The reaction mixture was then concentrated to dryness under reduced pressure. The crudesolid residue was purified by column chromatography (230-440 mesh silica gel, eluent: 70% ether in petroleum ether to 100% ether) to afford 11.1 g (43% yield) pure product as a yellow crystalline compound. ¹ H NMR (CDCl₃)δ: 2.32 (s, 3H); 2.51 (s, 3H); 3.62 (t, 2H); 4.30 (m, 2H); 5.45 (s, 1H); 7.01 (brs, 1H); 7.36 (t, 1H); 7.45 (d, 1H); 7.56 (d, 1H); 7.59 (s, 1H). Mass spectrum m/e 404.0737 (M⁺, calcd. for C₁₆ H₁₆ N₂ O₄ F₃ Cl 404.0750).

Part B: Preparation of 1,4-Dihydro-2,6-dimethyl-5-nitro-4-[3-(trifluoromethyl)phenyl]-[2-[4-(2-methoxyphenyl)-1-piperazinyl]ethyl]ester-3-pyridinecarboxylic acid

To the mixture of 3.38 g (8.3 mmol) of the above chloride, 700 mg (8.3 mmol) of sodium bicarbonate and mg of potassium iodide in 75 mL of n-butanol at room temperature under nitrogen was added 1.93 g (10.0 mmol) of 1-(o-methoxyphenyl)piperazine. The reaction mixture was refluxed for 5 hours. After cooling to room temperature, 50 mL of saturated aqueous NaCl was added to the mixture and the reaction mixture was extracted with ethylacetate (EtOAc; 4×50 mL). The combined organic solvents were dried over magnesium sulfate (MgSO₄), and concentrated to give 7.2 g of a pale yellow solid which was purified by flash column chromatography (eluent: 70% ether in petroleum ether to ether) to afford 3.42 g (74% yield) of yellow crystalline product; mp 180°-183° C.

¹ H NMR (CDCl₃)δ: 2.36 (s, 3H); 2.51 (s, 3H); 2.64 (m, 6H);3.05 (m, 4H); 3.86 (s, 3H); 4.21 (t, 2H); 5.47 (s, 1H); 6.78-6.99 (m, 5H); 7.26-7.55 (m, 4H). Mass spectrum m/e 560.2217 (M+, calcd. for C₂₈ H₃₁ H₄ O₅ F₃ 560.2246).

EXAMPLE 2 Preparation of 1,4-Dihydro-2,6-Dimethyl-5-nitro-4-[2-(trifluoromethyl)phenyl]-[2-[4-(2-methoxyphenyl)-1-piperazinyl]ethyl]ester-3-pyridinecarboxylic acid.

To a stirred suspension of 1.5 g (4.3 mmol) of acid in 19 mL of dry methylene chloride at 4° under nitrogen was added 1.01 g (4.4 mmol)of PCl₅ in small portions. The reaction mixture was stirred for 1 hr. After cooling to -15°, a solution of 1.37 g (5.8 mmol) Of 4-(o-methoxyphenyl)-1-piperazineethanol in 5.4 mL of dry methylene chloride was added dropwise. The reaction mixture was stirred at -15° to 0° for 3 hrs. The mixture was then washed with cold saturated aqueous sodium carbonate followed by water. The organic phase was dried (MgSO₄), and concentrated. The solid residue was purified by column chromatography (eluent: 20% hexane in EtOAc) to give 1.0 g of yellow solid, which was recrystallized with butyl chloride/methanol to afford 790 mg (33% yield) of product as a yellow crystalline compound; mp 125°-126°.

¹ H NMR (CDCl₃)δ: 2.33 (s, 3H); 2.50 (s, 3H); 2.50-2.70 (m,6H); 2.83-3.10 (m, 4H); 3.86 (s, 3H); 4.00-4.33 (m, 2H), 5.97 (s, ¹ H); 6.20 (s, 1H), 6.77-7.00 (m, 4H); 7.33-7.77 (m, 4H).

The compounds of Examples 1 and 2 are listed in Table 1 along with other compounds which were or can be prepared by the methods described in Examples 1 and/or 2.

                                      TABLE 1                                      __________________________________________________________________________      ##STR29##                                                                     Ex.                                                                            No. R.sup.1                                                                          R.sup.2                                                                             R.sup.3                                                                           R.sup.4   R.sup.5                 R.sup.6                                                                             R.sup.9                                                                             mp                   __________________________________________________________________________                                                               °C.            1 H  3-CF.sub.3                                                                          NO.sub.2                                                                          CH.sub.3                                                                                  ##STR30##              CH.sub.3                                                                            H    180-183               2 H  2-CF.sub.3                                                                          NO.sub.2                                                                          CH.sub.3                                                                                  ##STR31##              CH.sub.3                                                                            H    125-126               3 H  2-NO.sub.2                                                                          NO.sub.2                                                                          CH.sub.3                                                                                  ##STR32##              CH.sub.3                                                                            H                          4 H  3-NO.sub.2                                                                          NO.sub.2                                                                          CH.sub.3                                                                                  ##STR33##              CH.sub.3                                                                            H                          5 H  2-Cl NO.sub.2                                                                          CH.sub.3                                                                                  ##STR34##              CH.sub.3                                                                            H    (glassy.sup.a                                                                  solid)                6 H  3-Cl NO.sub.2                                                                          CH.sub.3                                                                                  ##STR35##              CH.sub.3                                                                            H                          7 H  2-OCH.sub.3                                                                         NO.sub.2                                                                          CH.sub.3                                                                                  ##STR36##              CH.sub.3                                                                            H                          8 H  3-OCH.sub.3                                                                         NO.sub.2                                                                          CH.sub.3                                                                                  ##STR37##              CH.sub.3                                                                            5-OCH.sub.3                9 3-CH.sub.3                                                                        2-CF.sub.3                                                                          NO.sub.2                                                                          CH.sub.2 OCH.sub.2 CH.sub.2 NH.sub.2                                                      ##STR38##              CH.sub.3                                                                            H                         10 3-OCH.sub.3                                                                       2-CH.sub.2 F                                                                        NO.sub.2                                                                          CH.sub.2 OCH.sub.2 CH.sub.2 NH.sub.2                                                      ##STR39##              CH.sub.3                                                                            H                         11 H  2-CF.sub.3                                                                          NO.sub.2                                                                          CH.sub.2 CH(CH.sub.3).sub.2                                                               ##STR40##              CH.sub.3                                                                            5-Cl                      12 H  2-Cl NO.sub.2                                                                          CN                                                                                        ##STR41##              CH.sub.3                                                                            H                         13 H  2-CF.sub.3                                                                          NO.sub.2                                                                          CH.sub.3                                                                                  ##STR42##              CH.sub.3                                                                            H    185-188              14 H  3-CF.sub.3                                                                          NO.sub.2                                                                          CH.sub.3                                                                                  ##STR43##              CH.sub.3                                                                            H                         15 H  2-NO.sub.2                                                                          NO.sub.2                                                                          CH.sub.3                                                                                  ##STR44##              CN   H                         16 H  3-NO.sub.2                                                                          NO.sub.2                                                                          CH.sub.3                                                                                  ##STR45##              CN   H                         17 H  2-Cl NO.sub.2                                                                          CH.sub.3                                                                                  ##STR46##              CN   H                         18 H  3-Cl NO.sub.2                                                                          CH.sub.3                                                                                  ##STR47##              CN   H                         19 H  2-OCH.sub.3                                                                         NO.sub.2                                                                          CH.sub.3                                                                                  ##STR48##              CH.sub.2 OH                                                                         H                         20 H  3-OCH.sub.3                                                                         NO.sub.2                                                                          CH.sub.3                                                                                  ##STR49##              CH.sub.2 OH                                                                         H                         21 H  3-CF.sub.3                                                                          NO.sub.2                                                                          CH.sub.3                                                                                  ##STR50##              CH.sub.2 OH                                                                         H                         22 H  2-CF.sub.3                                                                          NO.sub.2                                                                          CH.sub.3                                                                                  ##STR51##              CH.sub.3                                                                            H                         23 H  3-CF.sub.3                                                                          NO.sub.2                                                                          CH.sub.3                                                                                  ##STR52##              CH.sub.3                                                                            H                         24 H  2-NO.sub.2                                                                          NO.sub.2                                                                          C.sub.2 H.sub.5                                                                           ##STR53##              C.sub.2 H.sub.5                                                                     H                         25 H  3-NO.sub.2                                                                          NO.sub.2                                                                          CH.sub.3                                                                                  ##STR54##              CH.sub.3                                                                            H                         26 H  2-Cl NO.sub.2                                                                          CH.sub.3                                                                                  ##STR55##              CH.sub.3                                                                            H                         27 H  3-Cl NO.sub.2                                                                          CH.sub.3                                                                                  ##STR56##              CH.sub.3                                                                            H                         28 H  2-OCH.sub.3                                                                         NO.sub.3                                                                          CH.sub.3                                                                                  ##STR57##              CH.sub.3                                                                            H                         29 H  3-OCH.sub.3                                                                         NO.sub.2                                                                          CH.sub.3                                                                                  ##STR58##              CH.sub.3                                                                            H                         30 3-CH.sub.3                                                                        2-CF.sub.3                                                                           ##STR59##                                                                                   ##STR60##              CH.sub.3                                                                            H                         31 H  2-CF.sub.3                                                                           ##STR61##                                                                                   ##STR62##              CH.sub.3                                                                            H                         32 H  2-CF.sub.3                                                                           ##STR63##                                                                                   ##STR64##              CH.sub.3                                                                            H                         33 H  3-CF.sub.3                                                                           ##STR65##                                                                                   ##STR66##              CH.sub.3                                                                            H                         34 H  2-NO.sub.2                                                                           ##STR67##                                                                                   ##STR68##              CH.sub.3                                                                            H                         35 H  3-NO.sub.2                                                                           ##STR69##                                                                                   ##STR70##              CH.sub.3                                                                            H                         36 H  2-Cl                                                                                 ##STR71##                                                                                   ##STR72##              CH.sub.3                                                                            H                         37 H  3-Cl                                                                                 ##STR73##                                                                                   ##STR74##              CH.sub.3                                                                            H                         38 H  2-OCH.sub.3                                                                          ##STR75##                                                                                   ##STR76##              CH.sub.3                                                                            H                         39 H  3-OCH.sub.3                                                                          ##STR77##                                                                                   ##STR78##              CH.sub.3                                                                            H                         40 H  2-CF.sub.3                                                                           ##STR79##                                                                                   ##STR80##              CH.sub.3                                                                            H                         41 H  3-CF.sub.3                                                                           ##STR81##                                                                                   ##STR82##              CH.sub.3                                                                            H                         42 H  2-NO.sub.2                                                                           ##STR83##                                                                                   ##STR84##              CH.sub.3                                                                            H                         43 H  3-NO.sub.2                                                                           ##STR85##                                                                                   ##STR86##              CH.sub.3                                                                            H                         44 H  2-Cl                                                                                 ##STR87##                                                                                   ##STR88##              CH.sub.3                                                                            H                         45 H  3-Cl                                                                                 ##STR89##                                                                                   ##STR90##              CH.sub.3                                                                            H                         46 H  2-OCH.sub.3                                                                          ##STR91##                                                                                   ##STR92##              CH.sub.3                                                                            H                         47 H  3-OCH.sub.3                                                                          ##STR93##                                                                                   ##STR94##              CH.sub.3                                                                            H                         48 H  2-CF.sub.3                                                                           ##STR95##                                                                                   ##STR96##              CH.sub.3                                                                            H                         49 H  3-CF.sub.3                                                                           ##STR97##                                                                                   ##STR98##              CH.sub.3                                                                            H                         50 H  2-NO.sub.2                                                                           ##STR99##                                                                                   ##STR100##             CH.sub.3                                                                            H                         51 H  3-NO.sub.2                                                                           ##STR101##                                                                                  ##STR102##             CH.sub.3                                                                            H                         52 H  2-Cl                                                                                 ##STR103##                                                                                  ##STR104##             CH.sub.3                                                                            H                         53 H  3-Cl                                                                                 ##STR105##                                                                                  ##STR106##             CH.sub.3                                                                            H                         54 H  2-OCH.sub.3                                                                          ##STR107##                                                                                  ##STR108##             CH.sub.3                                                                            6-OCH.sub.3               55 H  3-OCH.sub.3                                                                          ##STR109##                                                                                  ##STR110##             CH.sub.3                                                                            H                         56 H  2-CF.sub.3                                                                          NO.sub.2                                                                          CH.sub.3                                                                                  ##STR111##             CH.sub.3                                                                            H    (glassy.sup.b                                                                  solid)               57 H  3-CF.sub.3                                                                          NO.sub.2                                                                          CH.sub.3                                                                                  ##STR112##             CH.sub.3                                                                            H    (glassy.sup.c                                                                  solid)               __________________________________________________________________________      .sup.a NMR: (CDCl.sub.3)δ 2.29 (s, 3H); 2.45 (s, 3H); 2.63 (m, 6H);      3.03 (m, 4H); 3.85 (s, 3H); 4.20 (t, 2H); 5.76 (s, 1H); 6.83-7.41 (m, 9H)      .sup.b Mass Spec. 589.27 (Calcd. 589.26 M + H).                                .sup.c Mass Spec. 589.28 (Calcd. 589.26 M + H).                          

EXAMPLE 58 Part A: Preparation of 1,4-Dihydro-2,6-dimethyl[4-[2-(2-Chloroethoxy)]phenyl]-5-nitro-methylester-3-pyridinecarboxylic acid

The dihydropyridine can be prepared by the procedure described in Part A ofExample 1 in 40% yield; mp 212°-214° C.

¹ H NMR(DMSO-d₆)δ: 2.24 (s, 3H); 2.47 (s, 3H); 3.51 (s, 3H); 3.90 (t, J=5.73 Hz, 2H); 4.21 (m, 2H); 5.41 (s, 1H); 6.87 (t, J=7.31 Hz, 1H); 6.93 (d, J=8.28 Hz, 1H); 7.10 (d, J=8.74 Hz, 1H); 7.17 (t, J=7.45Hz, 1H); 9.50 (br s, 1H).

Preparation of 1,4-Dihydro-2,6-dimethyl-[4-[2-(2-(4-(2-Methoxyphenyl)-1-piperazinyl))-ethoxy]phenyl]-5-nitro-methylester-3-pyridinecarboxylic acid

To a mixture of 2.0 g (5.46 mmol) of the above dihydropyridine, 458 mg (5.46 mmol) of sodium bicarbonate and 50 mg of potassium iodide in 150 ml of n-butanol was added 1.36 g (7.09 mmol) of 1-(o-methoxyphenyl)piperazine. The mixture was refluxed under nitrogen overnight. After cooling to room temperature, 100 ml of saturated aqueous NaCl was added. The mixture was extracted with ether (4×100ml). The combined organic solvents were dried (MgSO₄) and concentrated. The crude material was purified by column chromatography (eluent: 50% ether inEtOAc) to afford 1.75 g (62% yield) product as a yellow crystalline compound; mp 185°-186° C.

¹ H NMR (DMSO-d₆)δ: 2.28 (s, 3H); 2.51 (s, 3H); 2.71 (m, 6H); 3.02 (m, 4H); 3.56 (s, 3H); 3.81 (s, 3H); 4.10 (m, 2H); 5.49 (s, ¹ H); 6.90-7.21 (m, 8H); 9.52 (br s, 1H).

EXAMPLE 59 Part A: Preparation of 1,4-dihydro-2,6-dimethyl-4-[2-(5-chloropentoxy)phenyl]-5-nitro-methyl ester-3-pyridinecarboxylic acid

The dihydropyridine was prepared by the method described in Part A of Example 1 in 32% yield (23.7 g); mp 153°-155°. ¹ H NMR (acetone d₆)δ: 1.58 (m, 2H); 1.80 (m, 4H); 2.27 (s, 3H); 2.47 (s, 3H); 3.53 (s, 3H); 3.67 (t, 2H); 3.93 (t, 2H); 5.52 (s, 1H); 6.79 (m, 2H); 7.10 (m, 2H); 9.34 (br s, 1H). Mass. spectrum m/e 565.32 (M+ calcd. for C₃₁ H₄₀ N₄ O₆, 565.30).

Part B: Preparation of 1,4-dihydro-2,6-dimethyl-4[2-(5-(4-(2-methoxyphenyl)-1-piperazinyl)pentoxyl)-phenyl]-5-nitro-methyl ester-3-pyridinecarboxylic acid

The product was obtained by the method described in Part B of Example 1 in 80% yield (8.5 g). ¹ H NMR (CDCl₃)δ: 1.70 (m, 6H); 2.26 (s, 3H); 2.40 (m, H); 2.45 (s, 3H); 2.71 (m, 4H); 3.12 (m, 4H); 3.59 (s, H); 3.85 (s, 3H); 3.90 (m, 2H); 5.57 (s, 1H); 6.50-7.50 (m, 9H). Mass spectrum m/e 565.32 (m+ calcd. for C₃₁ H₄₀ N₄ O₆, 565.30).

EXAMPLE 60 Part A: Preparation of 1,4-dihydro-2,6-dimethyl-4-[2-(4-chlorobutoxy)phenyl]-5-nitro-methylester-3-pyridinecarboxylic acid

The dihydropyridine was prepared by the procedure described in Part A of Example 1 in 32% yield (2.5 g); mp 183-185° . 1H NMR (acetone d6)δ: 2.00 (m, H); 2.31 (s, 3H); 2.49 (s, 3H); 3.56 (s, 3H); 3.74 (m, H); 4.02 (m, 2H); 5.63 (s, 1H); 7.00 (m, 4H); 8.50 (br s, 1H). Mass spectrum m/e: 394.1271 (M+ calcd. for C₁₉ H₂₃ ClN₂ O₅,394.1290).

Part B: Preparation of 1,4-dihydro-2,6-dimethyl-'nitro-4-[2-(4-(4-(2-pyrimidinyl)-piperazinyl)butoxy)phenyl]methylester-36pyridinecarboxylic acid

The product was obtained in 82% yield (1.5 g) using the procedure describedin Part B of Example 58. ¹ H NMR (CDCl₃)δ: 1.70 (m, 4H); 2.25 (s, 3H); 2.50 (s, H); 2.57 (m, 6H) 3.54 (m, 4H); 3.59 (s, 3H); 3.93 (m, H); 5.58 (s, 1H); 6.59 (t, 2H); 6.80 (t, 2H); 7.11 (t, 1H); 7.27 (d, 1H); 7.47 (t, 1H); 7.85 (s, 1H); 8.19 (d, 2H). Mass spectrum m/e: 523.27 (m+ calcd. for C₂₇ H₃₄ N₆ O₅ 4, 523.27).

EXAMPLE 61 Preparation of 1,4-dihydro-2,6-dimethyl-4-[2(10-bromodecyloxy)phenyl]-5-nitro-methyl ester-3-pyridinecarboxylic acid

The dihydropyridine was prepared by the procedure described in Part A of Example 1 in 27% yield (2.7 g); mp 122°-125°. ¹ H NMR (acetone d⁶)δ: 1.35 (m, H); 2.05 (m, 2H); 2.29 (s, 3H); 2.48 (s, 3H); 3.56 (s, 3H); 3.57 (m, 2H); 3.95 (t, 2H); 5.59 (s, 1H); 6.73-7.30(m, 4H); 8.46 (br s, ¹ H). Mass spectrum m/e: 523.18 (m+ calcd. for C₂₅ H₃₅ BrN₂ O₅, 523.18).

Part B: Preparation of 1,4-dihydro-2,6-dimethyl-4[2(10-(4-(2-methoxyphenyl)-piperazinyl)decyloxy)phenyl]-5-nitro-methyl ester-3-pyridinecarboxylic acid

The product was prepared in 81% yield (1.7 g) using the procedure describedin Part B of Example 58. ¹ H NMR (CDCl₃)δ: 1.31 (m, 16H); 2.26 (s, 3H); 2.28 (m, 2H); 2.44 (s, 3H); 2.65 (m, 4H); 3.11 (m, 4H); 3.59(s, 3H); 3.85 (s, 3H); 3.88 (m, 2H); 5.60 (s, 1H); 6.45 (br s, 1H); 6.70-7.30 (m, 8H). Mass spectrum m/e: 635.46 (M+ calcd. for C₃₆ H₅₀ N₄.₆, 635.38).

EXAMPLE 62 Part A: Preparation of [4-[3-(3-chloropropoxy)phenyl]]-2-methyl-5-oxo-1,4,5,tetrahydrofuro[3,4-b]-methylester-3-pyridinecarboxylic acid

The dihydropyridine lactone was prepared by the procedure described by S. D. Young, Synthesis, 617-618, 1984 from the corresponding 4-aryl-2,6-dimethyl-1,4-dihydropyridine-3,5-dimethylcarboxylate in 42% yield (0.42 g). ¹ H NMR (CDCl₃)δ: 2.18 (t, 2H); 2.34 (s, 3H); 3.58 (s, 3H); 3.70 (t, 2H); 4.05 (t, 2H); 4.54 (d, 2H); 4.84 (s, ¹ H); 6.68 (d, 1H); 6.80 (d, 2H); 7.16 (t, ¹ H); 8.18 (br s, ¹ H).

PART B: Preparation of [4-(3-(3-4-(2-methoxyphenyl)-1 Part B: Preparation of [4-(3-(3-4-(2-methoxyphenyl)-1-piperazinyl)propoxy))phenyl]-2-methyl-5-oxo-1,4,5,7-tetrahydrofuro[3,4-b]-methylester-3-pyridinecarboxylic acid

This product was prepared by the same procedure described in Example 58 Part B (72% yield, g). ¹ H NMR (CDCl₃)δ: 2.02 (s, 3H); 2.60 (m, 6H); 3.08 (m, 4H); 3.55 (s, 3H); 3.85 (s, 3H); 4.0 (t, 2H); 4.71 (s, 2H); 4.80 (s, 1H); 6.71 (d, 1H); 6.91 (m, 6H); 7.14 (t, 1H); 9.37 (br s, 1H).

Compounds listed in Table 2 were prepared or can be prepared using the methods described in Examples 58-62 and by the methods described hereinabove.

    TABLE 2       ##STR113##        Ex.         No. R.sup.1 R.sup.2 R.sup.3 R.sup.4 R.sup.5 R.sup.6      R.sup.9 mp °C.        58H       ##STR114##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H 185-186       59 H      ##STR115##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassysolid)  60 H       ##STR116##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassysolid)  61 H       ##STR117##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassysolid)      62 H       ##STR118##       ##STR119##       CO.sub.2 CH.sub.3 CH.sub.3 H (glassysolid)       63 H      ##STR120##       ##STR121##       CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.rrsolid)           64 H       ##STR122##       NO.sub.2 CH.sub.3 CO.sub.2 Et CH.sub.3 H               65 H      ##STR123##       ##STR124##       CO.sub.2 Et CH.sub.3 H                66 H      ##STR125##       NO.sub.2 CH.sub.3       ##STR126##       CH.sub.3 H               67 H      ##STR127##       ##STR128##       ##STR129##       CH.sub.3 H                68 6-NO.sub.2      ##STR130##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H 104-106       69 H      ##STR131##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.asolid)          70 H       ##STR132##       ##STR133##       CO.sub.2 CH.sub.3 CH.sub.3 H                71 H      ##STR134##       NO.sub.2 CH.sub.3 NO.sub.2 CH.sub.3 H               72 H      ##STR135##       ##STR136##       CO.sub.2 Et CH.sub.3 H                 73 H      ##STR137##       NO.sub.2 CH.sub.3       ##STR138##       CH.sub.3 H               74 H      ##STR139##       ##STR140##       ##STR141##       CH.sub.3 H                75 3-OCH.sub.3      ##STR142##       NO.sub.2 CH.sub.3 CO.sub. 2 CH.sub.3 CH.sub.3 H          76 3-OCH.sub.3       ##STR143##       ##STR144##       CO.sub.2 CH.sub.3 CH.sub.3 H                77 3-Cl      ##STR145##       NO.sub.2 CH.sub.3 CO.sub.2 Et CH.sub.3 5-Cl               78 3-Cl      ##STR146##       ##STR147##       CO.sub.2 Et CH.sub.3 H                79 3-CF.sub.3      ##STR148##       NO.sub.2 CH.sub.3       ##STR149##       CH.sub.3 H               80 3-OCH.sub.3      ##STR150##       ##STR151##       ##STR152##       CH.sub.3 H                81 H      ##STR153##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H               82 H      ##STR154##       ##STR155##       CO.sub.2 CH.sub.3 C.sub.3 H.sub.7 H                83 H      ##STR156##       NO.sub.2 CH.sub.3 CO.sub.2 Et CH.sub.2 O(CH.sub.2).sub.2 NH.sub.2 H  84      H       ##STR157##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.2 O(CH.sub.2).sub.2 NH.sub.2      H (glassy.sup.ppsolid)       85 2-CF.sub.3      ##STR158##       NO.sub.2 CH.sub.3       ##STR159##       CH.sub.2 O(CH.sub.2).sub.2 NH.sub.2 H                86 2-CF.sub.3      ##STR160##       ##STR161##       ##STR162##       CH.sub.2 O(CH.sub.2).sub.2 NH.sub.2 H                87 3-OCH.sub.3      ##STR163##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.b solid)  88      H       ##STR164##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H 150-151.5       89 H      ##STR165##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H 149-150       90 H      ##STR166##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       91 H      ##STR167##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       92 H      ##STR168##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       93 3-CH.sub.3      ##STR169##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       94 3-Cl      ##STR170##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H  95 3-OC.sub.2 H.sub.5       ##STR171##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       96 3-NO.sub.2      ##STR172##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       97 3-CF.sub.3      ##STR173##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       98 2-NO.sub.2      ##STR174##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       99      ##STR175##       ##STR176##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       100 3-CH.sub.3      ##STR177##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       101 5-F      ##STR178##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H  102 2-OCH.sub.2 F       ##STR179##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       103 5-Br      ##STR180##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       104 H      ##STR181##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H 163-164       105 H      ##STR182##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.csolid)  106      3-OCH.sub.3       ##STR183##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.dsolid)  107      H       ##STR184##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.esolid)  108      3-OC.sub.2       H.sub.5      ##STR185##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.fsolid)  109      3-OC.sub.2       H.sub.5      ##STR186##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.gsolid)  110      3-OCH.sub.3       ##STR187##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub. 3 CH.sub.3 H (glassy.sup.hsolid)      111 3-OCH.sub.3       ##STR188##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.isolid)  112      3-OC.sub.2       H.sub.5      ##STR189##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.jsolid)  113      H       ##STR190##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.ksolid)  114      3-OCH.sub.3       ##STR191##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.lsolid)  115      H       ##STR192##       NO.sub.2 CH.sub.3 CONHPh CH.sub.3 H (glassy.sup.msolid)       116 H      ##STR193##        NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.nsolid)      117 H       ##STR194##       NO.sub.2 CH.sub.3 CO.sub.2 Et CH.sub.3 H (glassy.sup.osolid)  118 H       ##STR195##        NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H 114-117       119 H      ##STR196##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.psolid)  120      H       ##STR197##       NO.sub.2 CH.sub.3 CO.sub.2 Et CH.sub.3 H 133-135  121 3-OCH.sub.3       ##STR198##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H glassy.sup.qsolid)  122      H       ##STR199##       NO.sub.2 CH.sub.3 CONHPh CH.sub.3 H 132-134       123 H      ##STR200##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.rsolid)  124      H       ##STR201##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H 193-194.5  125 H       ##STR202##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.ssolid)  126      H       ##STR203##       NO.sub.2 CH.sub.3 CO.sub.2 Et CH.sub.3 H 131-133       127 H      ##STR204##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.tsolid)  128      H       ##STR205##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H 146-149       129 H      ##STR206##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H 138-141       130 H      ##STR207##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H 137-140       131 H      ##STR208##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.usolid)  132      H       ##STR209##       NO.sub.2 CH.sub.3 CO.sub. 2 CH.sub.3 CH.sub.3 H (glassy.sup.vsolid)      133 H       ##STR210##       NO.sub.2 CH.sub.3 CO.sub.2 iPr CH.sub.3 H 174-175.5       134 H      ##STR211##       NO.sub.2 CH.sub.3 CO.sub.2 iPr CH.sub.3 H (glassy.sup.wsolid)  135 H       ##STR212##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.xsolid)  136      H       ##STR213##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H 164-166  137 3-NO.sub.2       ##STR214##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.ysolid)  138      5-NO.sub.2       ##STR215##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H glassy.sup.zsolid)  139      3-NO.sub.2       ##STR216##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.aasolid)      140 3-NO.sub.2       ##STR217##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.bbsolid)      141 3-Cl       ##STR218##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 5 Cl (glassy.sup.ccsolid)      142 5-Br       ##STR219##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H 184-186 143 5-Cl       ##STR220##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H 183-185       144      ##STR221##       ##STR222##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.ddsolid)      145 5-Cl       ##STR223##       NO.sub.2 CH.sub.3 CO.sub. 2 CH.sub.3 CH.sub.3 H (glassy.sup.eesolid)      146 H       ##STR224##       NO.sub.2 CH.sub.3 CO.sub.2 tBu CH.sub.3 H (glassy.sup.ffsolid)  147      3-NO.sub.2       ##STR225##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassysolid)  148      3-NO.sub.2       ##STR226##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassysolid)  149      2-NO.sub.2       ##STR227##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.ggsolid)      150 2-NO.sub.2       ##STR228##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.hhsolid)      151 2-NO.sub.2       ##STR229##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.iisolid)      152 5-OCH.sub.3       ##STR230##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H 141-145  153 5-OCH.sub.3       ##STR231##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H 138.5-141.5  154 H       ##STR232##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.jjsolid)      155 H       ##STR233##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.kksolid)      156 H       ##STR234##       NO.sub.2 CH.sub.3 CONHPh CH.sub.3 H (glassy.sup.llsolid)  157 H       ##STR235##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.mmsolid)      158 2-NO.sub.2       ##STR236##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       159 2-NO.sub.2      ##STR237##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       160 2-NO.sub.2      ##STR238##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       161 2-NO.sub.2      ##STR239##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H  162 3-OCH.sub.3       ##STR240##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.qqsolid)      163 3-NO.sub. 2       ##STR241##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       164 3-cf.sub.3      ##STR242##       NO.sub.2 CH.sub.3 CO.sub.2 Et CH.sub.3 5-NO.sub.2       165 3-Cl      ##STR243##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 6-Cl       166 H      ##STR244##       NO.sub.2 CH.sub.3       ##STR245##       CH.sub.3 H       167 H      ##STR246##       NO.sub.2 CH.sub.3       ##STR247##       CH.sub.3 H       168 H      ##STR248##       CN CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.nnsolid)  169 H       ##STR249##       CN CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.sssolid)  170 H       ##STR250##       CN CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.ttsolid)  171 H       ##STR251##       CN CH.sub. 3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.uusolid)  172      3-CF.sub.3       ##STR252##       CN CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       173 H      ##STR253##       CN CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.vvsolid)  174 H       ##STR254##       CONH.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       175 H      ##STR255##       CONH.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H  176 3-NO.sub.2       ##STR256##       CONH.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       177 H      ##STR257##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 H       178 H      ##STR258##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       179 H      ##STR259##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       180 H      ##STR260##       NO.sub. 2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       181 H      ##STR261##       CN CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       182 3-NO.sub.2      ##STR262##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       183 3-F      ##STR263##       NO.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       184 H      ##STR264##       ##STR265##       CO.sub.2 CH.sub.3 CH.sub.3 H       185 3-NO.sub.2      ##STR266##       ##STR267##       CO.sub.2 CH.sub.3 CH.sub.3 H       186 3-F      ##STR268##       CONH.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H       187 H      ##STR269##       CONH.sub.2 CH.sub.3 CO.sub.2 CH.sub.3 CH.sub.3 H          188 H       ##STR270##       ##STR271##       CO.sub.2 CH.sub.3 CH.sub.3 H       189 H      ##STR272##       ##STR273##       CO.sub.2 CH.sub.3 CH.sub.3 H       190 H      ##STR274##       ##STR275##       CO.sub.2 CH.sub.3 CH.sub.3 H       191 H      ##STR276##       ##STR277##       CO.sub.2 CH.sub.3 CH.sub.3 H       192 H      ##STR278##       ##STR279##       CO.sub.2 CH.sub.3 CH.sub.3 H (glassy.sup.oosolid)       193 H      ##STR280##       ##STR281##       CO.sub.2 CH.sub.3 CH.sub.3 H       194 H      ##STR282##       ##STR283##       CO.sub.2 Et CH.sub.3 H       195 H      ##STR284##       ##STR285##       CO.sub.2 CH.sub.3 CH.sub.3 H       196 H      ##STR286##       ##STR287##       CO.sub.2 CH.sub.3 CH.sub.3 H       197 H      ##STR288##       ##STR289##       CO.sub.2 CH.sub.3 CH.sub.3 H       198 H      ##STR290##       ##STR291##       CO.sub.2 CH.sub.3 CH.sub.3 H       199 H      ##STR292##       ##STR293##       CO.sub.2 CH.sub.3 CH.sub.3 H       200 H      ##STR294##       ##STR295##       CO.sub.2 CH.sub.3 CH.sub.3 H       201 3-CF.sub.3      ##STR296##       ##STR297##       CO.sub.2 CH.sub.3 CH.sub.3 6-CH.sub.3       202 3-Cl      ##STR298##       ##STR299##       CO.sub.2 CH.sub.3 CH.sub.3 H       203 2-NO.sub.2      ##STR300##       ##STR301##       CO.sub.2 CH.sub.3 CH.sub.3 5-NO.sub.2       204 3-NO.sub.2      ##STR302##       ##STR303##       CO.sub.2 CH.sub.3 CH.sub.3 H       205 3-F      ##STR304##       ##STR305##       CO.sub.2 CH.sub.3 CH.sub.3 H       206 3-Cl      ##STR306##       ##STR307##       CO.sub.2       CH.sub.3 CH.sub.3 5-Cl                                           .sup.a      NMR: (Acetone d.sub.6)δ 2.36 (s, 3H); 2.54 (s, 3H); 2.68 (m, 4H);      2.78 (t, 2H); 3.03 (m, 4H); 3.65 (s, 3H); 3.82 (s, 3H); 4.10 (t, 2H);      5.40 (s, 1H); 6.75 (m, 1H); 6.75 (m, 1H); 6.89 (m, 6H); 7.15 (t, 1H);      8.54 (br s, 1H). .sup.b NMR: (CDCl.sub.3)δ 2.27 (s, 3H); 2.48 (s,      3H); 2.60-3.30 (m, 10H); 3.63 (s, 3H); 3.79 (s, 3H); 3.86 (s, 3H);      4.07-4.23 (m, 2H); 5.63 (s, 1H); 6.71-7.01 (m, 8H). .sup.c Mass Spec:      551.4 (M + H) .sup.d Mass Spec: 567 (M + H) .sup.e       NMR: (CDCl.sub.3)δ: 1.75 (m, 4H); 2.35 (s, 3H); 2.49 (m, 2H) 2.51      (s, 3H); 2.70 (m, 4H); 3.15 (m, 4H); 3.68 (s, 3H); 3.88 (s, 3H); 3.99      (m, 2H); 5.41 (s, 1H); 6.75 (m, 1H); 6.90 (m, 7H); 7.17 (t, 1H). .sup.f      Mass Spec: 561.2746 (Calcd. 561.2713) .sup.g Mass Spec: 595 (M + H)      .sup.h Mass Spec: m/e 580.99 (Calcd. 581.30 M + H) .sup.i       NMR: (CDCl.sub.3)δ: 1.58 (m, 4H); 1.86 (t, 2H); 2.25 (s, 3H);      2.43 (m, 2H); 2.47 (s, 3H); 2.68 (m, 4H); 3.11 (m, 4H); 3.63 (s, 3H)      3.79 (s, 3H); 3.90 (m, 2H); 5.62 (s, 1H); 6.72 (t, 1H); 6.90 (m, 6H);      7.23 (s, 1H). .sup.j Mass Spec: m/e 609.34 (Calcd. 609.33) .sup.k Mass      Spec: m/e 564.2999 (Calcd. 564.2948) .sup.l Mass Spec: 578 (M.sup.+);      579 (M + H) .sup.m Mass Spec: m/e 611.3107 (Calcd. 611.3107) .sup.n Mass      Spec: 522.27 (Calcd. 522.27 M + H) .sup.o NMR: (CDCl.sub.3)δ: 1.75      (t, 3H); 2.00 (m, 2H); 2.32 (s, 3H); 2.50 (s, 3H); 2.60 (m, 2H); 2.70      (m, 4H); 3.14 (m, 4H); 3.85 (s, 3H); 4.00 (t, 2H); 4.12 (q, 2H); 5.38      (s, 1H); 6.75 (m, 1H); 6.90 (m, 7H); 7.17 (t, 1H) .sup.p Mass Spec:      549.38 (Calcd. 549.27 M + H) .sup.q Mass Spec: 551.35 (Calcd. 551.28 M +      H) .sup.r Mass Spec: 633.26 (Calcd. 633.29 M + H) .sup.s Mass Spec:      549.16 (Calcd. 549.27 M + H) .sup.t Mass Spec: 547.29 (Calcd. 547.25 M +      H) .sup.u Mass Spec: 521.33 (Calcd. 521.28 M + H) .sup.v Mass Spec:      541.24 (Calcd. 541.22 M + H) .sup.w Mass Spec: 565.32 (Calcd. 565.30 M +      H) .sup.x Mass Spec: 537.28 (Calcd. 537.27 M + H) .sup.y Mass Spec:      582.27 (Calcd. 582.26 M + H) .sup.z Mass Spec: 596.31 (Calcd. 596.27 M +      H) .sup.aa NMR: (CDCl.sub.3)δ: 2.03 (m, 2H); 2.31 (s, 3H); 2.55      (s, 3H); 2.70 (m, 6H); 3.10 (m, 4H); 3.61 (s, 3H); 3.85 (s, 3H); 3.92      (m, 2H); 5.18 (s, 1H); 6.90 (m, 5H); 7.45 (bs, 1H); 7.60 (m, 2H).      .sup.bb Mass Spec: 610.28 (Calcd. 610.29 M + H) .sup.cc Mass Spec:      633.24 (Calcd. 633.22 M + H) .sup.dd Mass Spec: 591.37 (Calcd. 591.32 M      + H) .sup.ee Mass Spec: 599.29 (Calcd. 599.26 M + H) .sup.ff NMR:      (CDCl.sub.3)δ 1.35 (s, 9H); 1.72 (m, 4H); 2.25 (s, 3H); 2.46 (s,      3H); 2.50 (m, 2H); 2.68 (m, 4H); 3.10 (m, 4H); 3.90 (s, 3H); 5.45 (s,      1H); 6.90 (m, 8H); 7.30 (t, 1H). .sup.gg Mass Spec: m/e 582.38 (M.sup.+      Calcd. for C.sub.29 H.sub.35 N.sub.5 O.sub.8, 582.26) .sup.hh Mass Spec:      m/e 596.43 (M.sup.+ Calcd. for C.sub.36 H.sub.37 N.sub.5 O.sub.8,      596.27) .sup.ii Mass Spec: m/e 610.19 (M.sup.+ Calcd. for C.sub.31      H.sub.39 N.sub.5 O.sub.8, 610.29) .sup.jj NMR: (CDCl.sub.3)δ: 2.30      (s, 3H); 2.47 (s, 3H); 2.69 (m, 4H); 2.85 (t, 2H); 3.60 (s, 3H); 3.86      (m, 4H); 4.12 (t, 2H); 5.64 (s, 1H); 6.50 (m, 2H); 6.84 (t, 2H); 7.13      (m, 1H); 7.27 (d, 1H); 8.32 (d, 2H). Mass Spec: m/e 495.17 (M.sup.+      Calcd. for C.sub.25 H.sub.30 N.sub.6 O.sub.5, 495.23) .sup.kk NMR:      (Acetone d.sub.6)δ: 1.65 (m, 4H); 1.85 (m, 2H); 2.32 (s, 3H); 2.51      (s, 3H); 2.48 (m, 6H); 3.54 (s, 3H); 3.81 (t, 4H); 3.97 (t, 2H); 5.57      (s, 1H); 6.53 (t, 1H); 6.86 (t, 1H); 6.90 (d, 1H); 7.09 (t, 1H); 7.22      (d, 1H); 8.29 (d, 2H); 8.86 (br, s, 1H). Mass Spec: m/e 537.34 (M.sup.+      Calcd. for C.sub.28 H.sub.36 N.sub.6 O.sub.5, 537.26) .sup.ll NMR:      (CDCl.sub.3)δ 1.92 (t, 2H); 2.11 (s, 3H); 2.56 (m, 6H); 2.59 (s,      3H); 3.82 (m, 4H); 3.95 (d, 2H); 5.43 (s, 1H); 6.51 (t, 1H); 6.73 (d,      1H); 6.81 (d, 2H); 7.01 (t, 1H); 7.24 (m, 2H); 7.56 (d, 2H); 8.30 (d,      2H); 9.03 (br s, 1H); 9.32 (br s, 1H). .sup.mm NMR: (CDCl.sub.3)δ      1.46 (m, 6H); 1.62 (m, 2H); 2.30 (s, 3H); 2.48 (s, 3H); 2.56 (m, 6H);      3.59 (s, 3H); 3.86 (m, 4H);3.93 (t, 2H); 5.62 (s, 1H); 6.49 (t, 1H);      6.81 (t, 2H); 7.11 (t, 1H); 7.28 (d, 2H); 8.32 (d, 2H). .sup.nn NMR:      (CDCl.sub.3)δ: 1.97 (m, 2H); 2.10 (s, 3H); 2.34 (s, 3H); 2.60 (m,      6H); 3.11 (m, 4H); 3.58 (s, 3H); 3.86 (s, 3H); 4.02 (t, 2H); 4.57 (s,      1H); 6.23 (br s, 1H); 6.75-7.02 (m, 7H); 7.20 (t, 1H). Mass Spec: m/e      516.2736 (Calcd. for C.sub.30 H.sub.36 N.sub.4 O.sub.4, 516.2736)      .sup.oo MNR: (Acetone d.sub.6)δ: 1.87 (m, 4H); 2.38 (s, 3H); 2.70      (m, 6H); 3.51 (s, 3H); 3.60 (t, 2H); 3.91 (m, 4H); 4.73 (s, 2H); 5.17      (s, 1H); 6.53 (t, 1H); 6.83 (t, 2H); 7.16 (m, 2H); 8.30 (d, 2H); 8.72      (br s, 1H). .sup.pp NMR: (CDCl.sub.3)δ: 1.55 (m, 4H); 1.83 (m,      2H); 2.03 (m, 2H); 2.45 (t, 2H); 2.67 (m, 4H); 2.97 (t, 2H); 3.10 (m,      4H); 3.58 (s, 3H); 3.62 (t, 2H); 3.83 (s, 3H); 3.95 (t, 2H); 4.69 (ABq,      2H); 5.63 (s, 1H); 6.86 (m, 4H); 7.18 (m, 4H); 8.64 (br s, 1H). Mass      Spec: m/e 624.14 (M.sup.+ Calcd. for C.sub.33 H.sub.45 N.sub.5 O.sub.7,      624.34). .sup.qq MNR: (CDCl.sub.3)δ: 2.26 (s, 3H); 2.47 (s, 3H);      2.73 (m, 4H); 2.93 (m, 2H); 3.63 (s, 3H); 3.78 (s, 3H); 3.90 (m, 4H);      4.16 (t, 2H); 5.66 (s, 1H); 6.48 (t, 1H); 6.73 (d, 1H); 6.87 (m, 2H);      7.03 (br s, 1H); 8.31 (d, 2H). Mass Spec.: m/e 525.36 (M.sup.+ Calcd.      for C.sub.26 H.sub.32 N.sub.6 O.sub.6, 525.25). .sup.rr       NMR: (CDCl.sub.3)δ: 1.74 (m, 4H); 2.34 (s, 3H); 2.46 (t, 2H);      2.66 (m, 4H); 3.09 (m, 4H); 3.56 (s, 3H); 3.85 (s, 3H); 3.94 (t, 2H);      4.55 (dd, 2H); 4.85 (s, 1H); 6.50-7.50 (m, 8H); 7.69 (br s, 1H). .sup.ss      NMR: (CDCl.sub.3)δ: 1.73 (m, 4H); 2.03 (s, 3H); 2.33 (s, 3H); 2.47      (t, 2H); 2.67 (m, 4H); 3.11 (m, 4H); 3.57 (s, 3H); 3.86 (s, 3H); 3.97      (t, 2H); 4.57 (s, 1H); 6.30 (br s, 1H); 6.80 (m, 7H); 7.20 (t, 1H).      .sup.tt NMR: (CDCl.sub.3)δ: 1.80 (m, 4H); 1.97 (s, 3H); 2.32 (s,      3H); 2.50 (t, 2H); 2.68 (m, 4H); 3.11 (m, 4H); 3.52 (s, 3H); 3.86 (s,      3H); 4.03 (t, 2H); 5.09 (s, 1H); 6.01 (br s, 1H); 6.81-7.27 (m, 8H).      .sup.uu NMR: (CDCl.sub.3)δ: 1.70 (m, 4H); 2.00 (s, 3H); 2.31 (s,      3H); 2.50 (m, 6H); 3.58 (s, 3H); 3.82 (t, 4H); 3.97 (t, 2H); 4.56 (s,      1H); 6.48 (t, 1H); 6.80 (m, 4H); 7.19 (t, 1H); 8.30 (d, 2H). .sup.vv      NMR: (CDCl.sub.3)δ: 1.97 (m, 2H); 2.10 (s, 3H); 2.53 (s, 3H); 2.58      (m, 6H); 3.56 (s, 3H); 3.84 (t, 4H); 4.04 (t, 2H); 4.57 (s, 1H); 6.30      (br s, 1H); 6.48 (t, 1H); 6.80 (m, 3H); 7.22 (t, 1H); 8.31 (d, 2H). Mass      Spec: m/e 488.2502 (Calcd. for C.sub.27 H.sub.32 N.sub.6 O.sub.3,      488.2536).

The compounds shown in Table 3 can be prepared by the procedures described in Method G, paths a and b.

                                      TABLE 3                                      __________________________________________________________________________      ##STR308##                                                                    Ex.                                                                            No.                                                                               Ar        R.sup.3                                                                              R.sup.4                                                                           R.sup.5            R.sup.6                               __________________________________________________________________________     207                                                                               C.sub.6 H.sub.5                                                                          NO.sub.2                                                                             CH.sub.3                                                                           ##STR309##        CH.sub.3                              208                                                                               2-NO.sub.2 C.sub.6 H.sub.4                                                               NO.sub.2                                                                             CH.sub.3                                                                           ##STR310##        CH.sub.3                              209                                                                               3-NO.sub.2 C.sub.6 H.sub.4                                                               NO.sub.2                                                                             CH.sub.3                                                                           ##STR311##        CH.sub.3                              210                                                                               2-CF.sub.3 C.sub. 6 H.sub.4                                                              NO.sub.2                                                                             CH.sub.3                                                                           ##STR312##        CH.sub.3                              211                                                                               3-CF.sub.3 C.sub.6 H.sub.4                                                               NO.sub.2                                                                             CH.sub.3                                                                           ##STR313##        CH.sub.3                              212                                                                               2-ClC.sub.6 H.sub.4                                                                      NO.sub.2                                                                             CH.sub.3                                                                           ##STR314##        CH.sub.3                              213                                                                               3-ClC.sub.6 H.sub.4                                                                      NO.sub.2                                                                             CH.sub.3                                                                           ##STR315##        CH.sub.3                              214                                                                                ##STR316##                                                                              NO.sub.2                                                                             CH.sub.3                                                                           ##STR317##        CH.sub.3                              215                                                                               2-NO.sub.2 C.sub.6 H.sub.4                                                                ##STR318##                                                                              ##STR319##        CH.sub.3                              216                                                                               2-CF.sub.3 C.sub.6 H.sub.4                                                                ##STR320##                                                                              ##STR321##        CH.sub.3                              217                                                                               3-CF.sub.3 C.sub.6 H.sub.4                                                               CN    CH.sub.3                                                                           ##STR322##        CH.sub.3                              218                                                                               3-NO.sub.2 C.sub.6 H.sub.4                                                               CN    CH.sub.3                                                                           ##STR323##        CH.sub.3                              219                                                                               2-ClC.sub.6 H.sub.4                                                                      CN    CH.sub.3                                                                           ##STR324##        CH.sub.3                              220                                                                               3-ClC.sub.6 H.sub.4                                                                      CONH.sub.2                                                                           CH.sub.3                                                                           ##STR325##        CH.sub.3                              221                                                                               2-NO.sub.2 C.sub.6 H.sub.4                                                               CONH.sub.2                                                                           CH.sub.3                                                                           ##STR326##        CH.sub.3                              222                                                                               3-NO.sub.2 C.sub.6 H.sub.4                                                               CONH.sub.2                                                                           CH.sub.3                                                                           ##STR327##        CH.sub.3                              __________________________________________________________________________

The compounds shown in Table 4 can be prepared as shown in Method G, path c.

                                      TABLE 4                                      __________________________________________________________________________      ##STR328##                                                                    Ex.                                                                            No. R.sup.3                                                                           R.sup.4                                                                               Z    R.sup.5                                                                            R.sup.6                                                                            R.sup.7   mp°                                __________________________________________________________________________     223 NO.sub.2                                                                          CH.sub.3                                                                               ##STR329##                                                                             CH.sub.3                                                                            ##STR330##                                         224 NO.sub.2                                                                          CH.sub.3                                                                               ##STR331##                                                                             CH.sub.3                                                                            ##STR332##                                         225 NO.sub.2                                                                          CH.sub.3                                                                               ##STR333##                                                                             CH.sub.3                                                                            ##STR334##                                         226 NO.sub.2                                                                          CH.sub.3                                                                               ##STR335##                                                                             CH.sub.3                                                                            ##STR336##                                         227 CN CH.sub.3                                                                               ##STR337##                                                                             CH.sub.3                                                                            ##STR338##                                         228                                                                                 ##STR339##                                                                               ##STR340##                                                                             CH.sub.3                                                                            ##STR341##                                         __________________________________________________________________________

Some examples of compounds wherein Ar is other than phenyl which can be prepared by the methods described in the specification are listed in Table

                                      TABLE 5                                      __________________________________________________________________________      ##STR342##                                                                    Ex.                                                                            No.                                                                               Ar       R.sup.3                                                                           R.sup.4                                                                           R.sup.5                                                                             R.sup.6                                                                           R.sup.7     mp°                               __________________________________________________________________________     229                                                                                ##STR343##                                                                             NO.sub.2                                                                          CH.sub.3                                                                          CO.sub.2 CH.sub.3                                                                   CH.sub.3                                                                           ##STR344##                                          230                                                                                ##STR345##                                                                             NO.sub.2                                                                          CH.sub.3                                                                          CO.sub.2 CH.sub.3                                                                   CH.sub.3                                                                           ##STR346##                                          231                                                                                ##STR347##                                                                             NO.sub.2                                                                          CH.sub.3                                                                          CO.sub.2 CH.sub.3                                                                   CH.sub.3                                                                           ##STR348##                                          232                                                                                ##STR349##                                                                             NO.sub.2                                                                          CH.sub.3                                                                          CO.sub.2 CH.sub.3                                                                   CH.sub.3                                                                           ##STR350##                                          233                                                                                ##STR351##                                                                             NO.sub.2                                                                          CH.sub.3                                                                          CO.sub.2 CH.sub.3                                                                   CH.sub.3                                                                           ##STR352##                                          234                                                                                ##STR353##                                                                             CN CH.sub.3                                                                          CO.sub.2 CH.sub.3                                                                   CH.sub.3                                                                           ##STR354##                                          235                                                                                ##STR355##                                                                             CN CH.sub.3                                                                           ##STR356##                                                                         CH.sub.3                                                                           ##STR357##                                          236                                                                                ##STR358##                                                                             CN CH.sub.3                                                                          CO.sub.2 Et                                                                         CH.sub.3                                                                           ##STR359##                                          237                                                                                ##STR360##                                                                             CN CH.sub.3                                                                          CO.sub.2 CH.sub.3                                                                   CH.sub.3                                                                           ##STR361##                                          __________________________________________________________________________

UTILITY

The compounds of this invention have been found to possess both Ca² + channel activity, preferably Ca² + agonist activity, and alpha₁ -antagonist activity. These pharmacological properties of the compounds ofthis invention were evaluated in the following pharmacological experiments.

DETERMINATION OF AFFINITY FOR ALPHA₁ -ADRENOCEPTORS

The [³ H]-prazosin binding assay was carried out according to the method described by Timmermans, P. B. M. W. M., Schoop, A. M. C., and Van Zwieten, P. A.: Biochem Pharmacol., 31, 899-905, 1982 (1). The reaction mixture contained partially purified rat brain membranes (source of alpha₁ -adrenoceptors), 0.2 nM [³ H]-prazosin with or without potential displacer in Tris buffer. The mixture was incubated for 60 minutes at 25° and subsequently terminated by rapid filtration through glass fiber-filter. Receptor-bound [³ H]-prazosin trapped in the filter was quantitated by scintillation counting. The inhibitory concentration (IC₅₀) of potential displacer which gives 50% displacement of the total specifically bound [³ H]-prazosin is presented as a measure of the affinity of such compound for the alpha₁ -adrenoceptor.

DETERMINATION OF AFFINITY FOR CALCIUM CHANNELS

[³ H]-Nitrendipine binding assay was carried out according to the method described by G. T. Bolger, et al., Biochem. Biophys. Res. Comm., 104, 1604-1609, 1982 (1). The reaction mixture contained rat cardiac microsomes (source of Ca² + channels), 0.5 nM [³ H]-nitrendipinewith or without potential displacer in Tris buffer. The mixture was incubated for 60 minutes at 25° and subsequently terminated by rapid filtration through a glass fiber-filter. Membrane-bound [³ H]-nitrendipine trapped in the filter was quantitated by scintillation counting. The inhibitory concentration (IC₅₀) of potential displacer which gives 50% displacement of the total specifically bound [³ H]-nitrendipine is presented as a measure of the affinity of such compoundfor the Ca² + channel.

The results from the above two in vitro assays are summarized in Table 6.

                  TABLE 6                                                          ______________________________________                                         Binding Affinity Data for                                                      Calcium And alpha.sub.1 -adrenoceptor                                                     [.sup.3 H]--Nitrendipine                                                                     [.sup.3 H]--Prazosin                                  Example    Binding       Binding                                               No.        IC.sub.50 [M] IC.sub.50 [M]                                         ______________________________________                                         1          1.4 × 10.sup.--7                                                                       9.6 × 10.sup.-7                                 2          2.9 × 10.sup.-8                                                                        8.0 × 10.sup.-7                                 5          7.3 × 10.sup.-8                                                                        4.9 × 10.sup.-7                                 13         8.3 × 10.sup.-7                                                                        >10.sup.-5                                            56         3.0 × 10.sup.-7                                                                        3.0 × 10.sup.-7                                 57         9.9 × 10.sup.-7                                                                        9.7 × 10.sup.-7                                 58         8.5 × 10.sup.-7                                                                        1.3 × 10.sup.-7                                 59         2.9 × 10.sup.-7                                                                        1.3 × 10.sup.-7                                 60         1.0 × 10.sup.-6                                                                        4.9 × 10.sup.-6                                 61         6.7 × 10.sup.-8                                                                        1.1 × 10.sup.-6                                 68         1.6 × 10.sup.-5                                                                        5.9 × 10.sup.-7                                 69         4.6 × 10.sup.-6                                                                        3.5 × 10.sup.-7                                 87         2.9 × 10.sup.-6                                                                        4.8 × 10.sup.-8                                 88         4.8 × 10.sup.-6                                                                        2.6 × 10.sup.-7                                 89         4.0 × 10.sup.-6                                                                        7.1 × 10.sup.-8                                 104        2.0 × 10.sup.-7                                                                        8.6 × 10.sup.-6                                 105        2.2 × 10.sup.-7                                                                        1.8 × 10.sup.-7                                 106        2.5 × 10.sup.-7                                                                        1.4 × 10.sup.-7                                 107        4.1 × 10.sup.-6                                                                        4.1 × 10.sup.-7                                 108        9.9 × 10.sup.-7                                                                        1.2 × 10.sup.-6                                 109        7.9 × 10.sup.-7                                                                        6.1 × 10.sup.-7                                 110        1.0 × 10.sup.-6                                                                        1.6 × 10.sup.-7                                 111        8.5 × 10.sup.-7                                                                        1.9 × 10.sup.-7                                 112        1.7 × 10.sup.-6                                                                        1.8 × 10.sup.-7                                 113        3.3 × 10.sup.-6                                                                        5.7 × 10.sup.-7                                 114        1.6 × 10.sup.-6                                                                        2.4 × 10.sup.-7                                 115        1.1 × 10.sup.-4                                                                        1.3 × 10.sup.-7                                 116        5.8 × 10.sup.-7                                                                        5.0 × 10.sup.-7                                 117        1.0 × 10.sup.-5                                                                        2.8 × 10.sup.-7                                 118        5.4 × 10.sup.-7                                                                        8.5 × 10.sup.-7                                 119        8.0 × 10.sup.-7                                                                        4.9 × 10.sup.-7                                 120        4.7 × 10.sup.-7                                                                        4.4 × 10.sup.-7                                 121        3.0 × 10.sup.-6                                                                        8.2 × 10.sup.-6                                 122        >10.sup.-5    2.3 × 10.sup.-7                                 123        1.7 × 10.sup.-6                                                                        4.5 × 10.sup.-6                                 124        1.8 × 10.sup.-5                                                                        1.2 × 10.sup.-6                                 125        1.4 × 10.sup.-6                                                                        4.4 × 10.sup.-7                                 126        5.0 × 10.sup.-6                                                                        2.9 × 10.sup.-7                                 127        2.0 × 10.sup.-6                                                                        2.7 × 10.sup.-6                                 128        5.7 × 10.sup.-6                                                                        1.0 × 10.sup.-7                                 129        3.6 × 10.sup.-7                                                                        3.8 × 10.sup.-7                                 130        3.8 × 10.sup.-7                                                                        3.3 × 10.sup.-7                                 131        3.6 × 10.sup.-6                                                                        1.5 × 10.sup.-7                                 132        2.3 × 10.sup.-6                                                                        1.3 × 10.sup.-7                                 133        4.2 × 10.sup.-7                                                                        7.5 × 10.sup.-7                                 134        8.4 × 10.sup.-6                                                                        3.4 × 10.sup.-7                                 135        6.7 × 10.sup.-6                                                                        4.3 × 10.sup.-7                                 136        >10.sup.-5    >10.sup.-5                                            137        6.1 × 10.sup.-6                                                                        4.4 × 10.sup.-7                                 138        2.2 × 10.sup.-7                                                                        2.8 × 10.sup.-7                                 139        1.2 × 10.sup.-7                                                                        1.4 × 10.sup.-7                                 140        1.6 × 10.sup.-7                                                                        1.8 × 10.sup.-7                                 141        6.3 × 10.sup.-7                                                                        8.3 × 10.sup.-7                                 142        1.8 × 10.sup.-7                                                                        2.5 × 10.sup.-7                                 143        1.9 × 10.sup.-7                                                                        3.5 × 10.sup.-7                                 144        1.3 × 10.sup.-6                                                                        3.1 × 10.sup.-7                                 145        1.8 × 10.sup.-7                                                                        6.3 × 10.sup.-7                                 146        4.7 × 10.sup.-7                                                                        9.9 ×  10.sup.-7                                149        8.9 × 10.sup.-6                                                                        2.9 × 10.sup.-7                                 150        4.0 × 10.sup.-6                                                                        2.2 × 10.sup.-7                                 151        4.7 × 10.sup.-6                                                                        2.0 × 10.sup.-7                                 152        6.9 × 10.sup.-7                                                                        2.7 × 10.sup.-7                                 153        8.8 × 10.sup.-7                                                                        1.2 × 10.sup.-7                                 154        1.4 × 10.sup.-6                                                                        9.3 × 10.sup.-6                                 155        2.5 × 10.sup.-7                                                                        2.6 × 10.sup.-6                                 ______________________________________                                    

PROTOCOL FOR POSITIVE INOTROPIC EFFECT IN GUINEA PIG LEFT ATRIA

Guinea pigs are killed by cervical dislocation. The left atria are removed and mounted at 1 gm resting tension in tissue baths containing oxygenated Krebs bicarbonate solution which is kept at 37°. The left atria areelectrically paced at 2Hz with square wave pulses of 1 msec duration. The voltage is set at 1.5× threshold level.

After a one hour equilibration period, control values for developed tension(DT, gm) are recorded. Test compounds are then added to the baths, in a cumulative manner to a maximum concentration of 10⁻⁴, to obtain a concentration-response curve. Treatment values of DT are obtained after the rug effect has reached a plateau and the exposure time for each concentration is 5-8 minutes. Percent change of the treatment value from the control value is calculated at each concentration of the test compound. The results are shown in Table 7 below.

                  TABLE 7                                                          ______________________________________                                         Ex. No.        EC.sub.50 (M).sup.a                                                                      Intrinsic Activity.sup.b                              ______________________________________                                         Control-Bay K8644                                                                             1.5 × 10.sup.-7                                                                    100                                                   1              2.7 × 10.sup.-5                                                                    30                                                    2              4.4 × 10.sup.-8                                                                    145                                                   5              5.6 × 10.sup.-7                                                                    100                                                   13             3.0 × 10.sup.-5                                                                    50                                                    56             6.0 × 10.sup.-6                                                                    100                                                   58             1.9 × 10.sup.-6                                                                    90                                                    59             1.0 × 10.sup.-6                                                                    35                                                    60             1.0 × 10.sup.-6                                                                    50                                                    61             >10.sup.-4                                                                               10                                                    69             >10.sup.-4                                                                               10                                                    87             >10.sup.-4                                                                               0                                                     88             2.0 × 10.sup.-6                                                                    50                                                    89             2.0 × 10.sup.-5                                                                    20                                                    105            3 × 10.sup.-6                                                                      20                                                    106            >10.sup.-4                                                                               0                                                     107            >10.sup.-4                                                                               0                                                     108            >10.sup.-4                                                                               0                                                     109            >10.sup.-4                                                                               0                                                     110            >10.sup.-4                                                                               0                                                     111            >10.sup.-4                                                                               0                                                     112            >10.sup.-4                                                                               0                                                     113            >10.sup.-4                                                                               0                                                     114            >10.sup.-4                                                                               0                                                     116            >10.sup.-4                                                                               0                                                     117            >10.sup.-4                                                                               0                                                     120            3.0 × 10.sup.-5                                                                    50                                                    123            >10.sup.-4                                                                               0                                                     125            >10.sup.-4                                                                               0                                                     129            2.0 × 10.sup.-6                                                                    15                                                    130            3.0 × 10.sup.-6                                                                    25                                                    139            >10.sup.-4                                                                               0                                                     140            >10.sup.-4                                                                               0                                                     142            >10.sup.-4                                                                               0                                                     ______________________________________                                          .sup.a EC.sub.50 (M) = concentration that increases DT by 50% above the        control DT.                                                                    .sup.b Intrinsic Activity is a ratio of the maximum effect of the test         compound to that of Bay K 8644 and expressed in percent.                 

The foregoing test results suggest that compounds of their invention have utility in the treatment of congestive heart failure.

DOSAGE FORMS

Compounds of this invention can be administered to treat said deficiencies by any means that produces contact of the active agent with the agent's site of action in the body of a mammal. The compounds can be administered by any conventional means available for use in conjunction with pharmaceuticals, either as individual therapeutic agents or in a combination of therapeutic agents. They can be administered alone, but aregenerally administered with a pharmaceutical carrier selected on the basis of the chosen route of administration and standard pharmaceutical practice.

The dosage administered will, of course, vary depending on the use and known factors such as the pharmacodynamic characteristics of the particular agent, and its mode and route of administration; age, health, and weight of the recipient; nature and extend of symptoms, kind of concurrent treatment, frequency of treatment, and the effect desired. For use in the treatment of said diseases, a daily dosage of active ingredientcan be about 50 to 1000 mg.

Dosage forms (compositions) suitable for administration contain from about 1 milligram to about 100 milligrams of active ingredient per unit. In these pharmaceutical compositions the active ingredient will ordinarily bepresent in an amount of about 0.5-95% by weight based on the total weight of the composition.

The active ingredient can be administered orally in solid dosage forms, such as capsules, tablets, and powders, or in liquid dosage forms, such aselixirs, syrups, and suspensions or parenterally, in sterile liquid dosage forms. Alternatively it can be administered sublingually by tablets, gels,pastes, patches or lozenges.

Gelatin capsules contain the active ingredient and powdered carriers, such as lactose, starch, cellulose derivatives, magnesium stearate, stearic acid, and the like. Similar diluents can be used to make compressed tablets. Both tablets and capsules can be manufactured as sustained release products to provide for continuous release of medication over a period of hours. Compressed tablets can be sugar coated or film coated to mask any unpleasant taste and protect the tablet from the atmosphere, or enteric coated for selective disintegration in the gastrointestinal tract.

Liquid dosage forms for oral administration can contain coloring and flavoring to increase patient acceptance.

In general, water, a suitable oil, saline, aqueous dextrose (glucose), and related sugar solutions and glycols such as propylene glycol or polyethylene glycols are suitable carriers for parenteral solutions. Solutions for parenteral administration preferably contain a water solublesalt of the active ingredient, suitable stabilizing agents, and if necessary, buffer substances. Antioxidizing agents such as sodium bisulfite, sodium sulfite, or ascorbic acid, either alone or combined, aresuitable stabilizing agents. Also used are citric acid and its salts and sodium EDTA. In addition, parenteral solutions can contain preservatives, such as benzalkonium chloride, methyl or propyl-paraben, and chlorobutanol.

Suitable pharmaceutical carriers are described in Remington's Pharmaceutical Sciences, A. Osol, a standard reference text in this field.

Useful pharmaceutical dosage forms for administration of the compounds of this invention can be illustrated as follows:

CAPSULES

A large number of unit capsules are prepared by filling standard two-piece hard gelatin capsules each with 100 milligrams of powdered active ingredient, 150 milligrams of lactose, 50 milligrams of cellulose, and 6 milligrams magnesium stearate.

SOFT GELATIN CAPSULES

A mixture of active ingredient in a digestable oil such as soybean oil, cottonseed oil or olive oil is prepared and injected by means of a positive displacement pump into gelatin to form soft gelatin capsules containing 100 milligrams of the active ingredient. The capsules are washed and dried.

TABLETS

A large number of tablets are prepared by conventional procedures so that the dosage unit is 100 milligrams of active ingredient, 0.2 milligrams of colloidal silicon dioxide, 5 milligrams of magnesium stearate, 275 milligrams of microcrystalline cellulose, 11 milligrams of starch and 98.8milligrams of lactose. Appropriate coatings may be applied to increase palatability or delay absorption.

INJECTABLE

A parenteral composition suitable for administration by injection is prepared by stirring 1.5% by weight of active ingredient in 10% by volume propylene glycol. The solution is made to volume with water for injection and sterilized.

SUSPENSION

An aqueous suspension is prepared for oral administration so that each 5 milliliters contain 100 milligrams of finely divided active ingredient, 100 milligrams of sodium benzoate, 1.0 grams of sorbitol solution, U.S.P.,and 0.025 milliliters of vanillin. 

What is claimed is:
 1. Compounds having the formula: ##STR362## or a pharmaceutically acceptable salt thereof wherein Ar is ##STR363## where Z and R⁵ are taken together as ##STR364## where t is 0 to 6; R¹ and R² independently are H, alkyl of 1-4 carbon atoms, haloalkyl of 1-4 carbon atoms, haloalkoxy of 1-4 carbon atoms, alkoxy of 1-10 carbon atoms, halogen, NO₂, (CH₂)_(q) XR⁷, XCH₂ (C₂ -C₉ alkenyl)R⁷, or XCH₂ (C₂ -C₉ alkynyl)R⁷ ; provided that both R¹ and R² are not hydrogen except when R⁵ is CO₂ R⁷ or COR⁷ ;R₃ independently is NO₂, H, CN, or CONH₂, or taken together with R⁴ is ##STR365## R⁴ and R⁶ independently are alkyl of 1-4 carbon atoms CN, CH₂ OH, or CH₂ OCH₂ CH₂ NH₂ ; R₅ independently is CO₂ R⁷ or COR⁷ when R¹ and R² are other than (CH₂)_(q) XR⁷, XCH₂ (C₂ -C₉ alkenyl)R⁷, or XCH₂ (C₂ -C₉ alkynyl)R⁷, and can also be an alkyl ester of 1-10 carbon atoms, ##STR366## NO₂, or ##STR367## when one of R¹ or R² is (CH₂)_(q) XR⁷, XCH₂ (C₂ -C₉ alkenyl)R⁷, or XCH₂ (C₂ -C₉ alkynyl)R⁷, or is taken together with Z as ##STR368## R⁷ is selected from --(A)_(r) --NH--Y--Ar', or ##STR369## where A is a straight or branched alkyl, alkenyl or alkynyl chain; Ar' is phenyl with one or two substituents selected from alkyl of 1-4 carbon atoms, haloalkyl of 1-4 carbon atoms, alkoxy of 1-4 carbon atoms, halogen, and NO₂ ; 2-, 3- or 4-pyridine; 2,6-pyrimidine; ##STR370## R⁸ is H or OCH₃ ; R⁹ is H, halogen, NO₂, alkoxy of 1-4 carbon atoms, or alkyl of 1-4 carbon atoms; X is O, S or NH; Y is (CH₂)_(q), (CH₂)_(n) O, (CH₂)_(n) NH or (CH₂)_(n) S; n is independently 1, 2 or 3; p is 0 to 10; q is 0, 1 or 2 and: r is 1 to 10 provided that:(1) when R⁵ is CO₂ R⁷ and R⁷ is ##STR371## or where R² is (CH₂)_(q) XR⁷, then p cannot be 0; and (2) when R⁵ is COR⁷, then R⁷ must be ##STR372## and p must be
 0. 2. A compound of claim 1 wherein Ar is ##STR373## wherein R¹, R² and R⁹ are as defined in claim
 1. 3. A compound of claim 2 wherein one of R¹ and R² is hydrogen and the other is Cl, CF₃, NO₂, OCH₃ or OR⁷, and R⁹ is H or halogen.
 4. A compound of claim 1 wherein R³ independently is NO₂, or taken together with R⁴ is ##STR374##
 5. A compound of claim 1 wherein R⁴ and R⁶ independently are alkyl of 1-4 carbon atoms.
 6. A compound of claim 1 wherein R⁵ is CO₂ R⁷ or COR⁷ and R¹ and R² are other than (CH₂ _(q) XR⁷, XCH₂ (C_(2-C) ₉ alkenyl)R⁷ or XCH₂ (C_(2-C) ₉ alkynyl)R⁷.
 7. A compound of claim 1 wherein R⁵ is an alkyl ester of 1-10 carbon atoms, NO₂, or phenyl NHCO and one of R¹ or R² is OR⁷.
 8. A compound of claim 1 wherein R⁷ is --(CH₂)_(r) --NH(CH₂)_(n) --O--Ar', or ##STR375## where Ar' is ##STR376## 2-pyridine, or 2,6-pyrimidine.
 9. A compound of claim 2 wherein R³ independently is NO₂, or taken together with R⁴ is ##STR377## R⁴ and R⁶ independently are alkyl of 1-4 carbon atoms; and R⁵ is an alkyl ester of 1-10 carbon atoms, NO₂, or phenyl NHCO; one of R¹ or R² is OR⁷ and the other is H, Cl, CF₃, NO₂ or OCH₃ ; and R⁹ is H or halogen.
 10. A compound of claim 9 wherein R⁷ is --(CH₂)_(r) --NH(CH₂)_(n) 3 O--Ar', or ##STR378## where Ar' is ##STR379## 2-pyridine, or 2,6-pyrimidine.
 11. A compound of claim 2 wherein one of R¹ and R² is H and the other is C1, CF₃, NO₂, or OCH₃ ; R⁹ is H or halogen; R³ independently is NO₂, or taken together with R⁴ is ##STR380## R⁴ and R⁶ independently are alkyl of 1-4 carbon atoms; and R⁵ is CO₂ R⁷ or COR⁷.
 12. A compound of claim 11 wherein R⁷ is --(CH₂)r--NH(CH₂)_(n) --O--Ar', or ##STR381## where Ar' is ##STR382## 2-pyridine, or 2,6-pyrimidine.
 13. A compound of claim 10 wherein R³ is NO₂.
 14. A compound of claim 12 wherein R³ is NO₂.
 15. A compound of claim 13 wherein R⁵ is CO₂ CH₃ or NO₂, and R⁷ is ##STR383## where Ar' is ##STR384## 2-pyridine, or 2,6-pyrimidine.
 16. A compound of claim 14 wherein R⁷ is ##STR385## where Ar' is ##STR386## 2-pyridine, or 2,6-pyrimidine.
 17. The compound of claim 1 which is 1,4-Dihydro-2,6e dimethyl-5-nitro-4-[3-(trifluoromethyl)-1piperazinyl]-ethyl]ester-3-pyridinecarboxylic acid.
 18. The compound of claim 1 which is 1,4-Dihydro-2,6dimethyl-4-[3-(2-((4(2-methoxyphenyl)-1-piperazinyl))ethoxy)-phenyl]-5-nitro-methyl ester-3-pyridinecarboxylic acid.
 19. The compound of claim 1 which is 1,4-Dihydro-2,6-dimethyl-4-[2-(2-((4(2-methoxyphenyl)-1-piperazinyl))ethoxy)-phenyl]-5-nitro-methyl ester 3-pyridinecarboxylic acid.
 20. The compound of claim 1 which is 1,4-Dihydro-2,6-dimethyl-4-[2-(2-((4-(2-methoxyphenyl)-1-piperazinyl))ethoxy)-3-(trifluoromethyl)phenyl]-5nitro-methylester-3-pyridinecarboxylic acid.
 21. The compound of claim 1 which is 1,4-Dihydro-2,dimethyl-4-[2-(3-((4-(2-methoxyphenyl)-1-piperazinyl))propoxy)-phenyl]-5-methylester-3pyridinecarboxylic acid.
 22. The compound of claim 1 which is 1-4-Dihydro-2,6dimethyl-5-nitro-4-[2-(4-(4-(2-pyrimidinyl)-piperazinyl)-butoxy)phenyl]-methylester-3pyridinecarboxlic acid.
 23. The compound of claim 1 which is 1,4-Dihydro-2,dimethyl-4-[2-(5-(4-(2-methoxyphenyl)-1-piperazinyl)pentoxyl)-penyl]-5-nitro-methyl-ester-3-pyridinecarboxylic acid.
 24. The compound of claim 1 which is 1,4-Dihydro-4-[2(10-(4-(2-methoxyphenyl)-piperazinyl)decyloxy)phenyl]-5-nitro-methylester-3-pyridinecarboxylic acid.
 25. A pharmaceutical composition for treating congestive heart failure consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of a compound of claim
 1. 26. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of a compound of claim
 2. 27. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of a compound of aim
 3. 28. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of a compound of claim
 4. 29. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of a compound of claim
 5. 30. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of a compound of claim
 6. 31. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of a compound of claim
 7. 32. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of a compound of claim
 8. 33. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of a compound of claim
 9. 34. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of a compound of claim
 10. 35. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of a compound of claim
 11. 36. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of a compound of claim
 12. 37. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of a compound of claim
 13. 38. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of a compound of claim
 14. 39. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of a compound of claim
 15. 40. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of a compound of claim
 16. 41. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of the compound of claim
 17. 42. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of the compound of claim
 18. 43. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of the compound of claim
 19. 44. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of the compound of claim
 20. 45. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of the compound of claim
 21. 46. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of the compound of claim
 22. 47. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of the compound of claim
 23. 48. A pharmaceutical composition consisting essentially of a pharmaceutically acceptable carrier and a therapeutically effective amount of the compound of claim
 24. 49. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of a compound of claim
 1. 50. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of a compound of claim
 2. 51. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of a compound of claim
 3. 52. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of a compound of claim
 4. 53. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of a compound of claim
 5. 54. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of a compound of claim
 6. 55. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of a compound of claim
 7. 56. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of a compound of claim
 8. 57. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of a compound of claim
 9. 58. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of a compound of claim
 10. 59. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of a compound of claim
 11. 60. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of a compound of claim
 12. 61. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of a compound of claim
 13. 62. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of a compound of claim
 14. 63. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of a compound of claim
 15. 64. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of a compound of claim
 16. 65. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of the compound of claim
 17. 66. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of the compound of claim
 18. 67. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of the compound of claim
 19. 68. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of the compound of claim
 20. 69. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of the compound of claim
 21. 70. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of the compound of claim
 22. 71. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of the compound of claim
 23. 72. A method for treating congestive heart failure in a mammal which comprises administering to the mammal a therapeutically effective amount of the compound of claim
 24. 